SQL Server

Office365 Send Email using SMTP with OAuth2 Authentication

See more Office365 Examples

Demonstrates how to send email from smtp.office365.com using OAuth2 authentication. SQL Server

-- Important: See this note about string length limitations for strings returned by sp_OAMethod calls.
--
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    -- Important: Do not use nvarchar(max).  See the warning about using nvarchar(max).
    DECLARE @sTmp0 nvarchar(4000)
    DECLARE @success int
    SELECT @success = 0

    -- This example requires the Chilkat API to have been previously unlocked.
    -- See Global Unlock Sample for sample code.

    -- An Office365 OAuth2 access token must first be obtained prior
    -- to running this code.

    -- Getting the OAuth2 access token for the 1st time requires the O365 account owner's 
    -- interactive authorization via a web browser.  Afterwards, the access token
    -- can be repeatedly refreshed automatically (with no user interaction).

    -- See the following examples for getting and refreshing an OAuth2 access token

    -- Get Office365 SMTP/IMAP/POP3 OAuth2 Access Token
    -- Refresh Office365 SMTP/IMAP/POP3 OAuth2 Access Token

    -- First get our previously obtained OAuth2 access token.
    DECLARE @jsonToken int
    EXEC @hr = sp_OACreate 'Chilkat.JsonObject', @jsonToken OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    EXEC sp_OAMethod @jsonToken, 'LoadFile', @success OUT, 'qa_data/tokens/office365.json'

    DECLARE @mailman int
    EXEC @hr = sp_OACreate 'Chilkat.MailMan', @mailman OUT

    EXEC sp_OASetProperty @mailman, 'SmtpHost', 'smtp.office365.com'
    EXEC sp_OASetProperty @mailman, 'SmtpPort', 587
    EXEC sp_OASetProperty @mailman, 'StartTLS', 1

    -- Use your Office365 email address for the SmtpUsername.
    EXEC sp_OASetProperty @mailman, 'SmtpUsername', 'OFFICE365_EMAIL_ADDRESS'
    EXEC sp_OAMethod @jsonToken, 'StringOf', @sTmp0 OUT, 'access_token'
    EXEC sp_OASetProperty @mailman, 'OAuth2AccessToken', @sTmp0

    -- Create a new email object
    DECLARE @email int
    EXEC @hr = sp_OACreate 'Chilkat.Email', @email OUT

    EXEC sp_OASetProperty @email, 'Subject', 'This is a test'
    EXEC sp_OASetProperty @email, 'Body', 'This is a test'
    EXEC sp_OASetProperty @email, 'From', 'MY_NAME <OFFICE365_EMAIL_ADDRESS>'
    EXEC sp_OAMethod @email, 'AddTo', @success OUT, 'John Doe', 'somebody@example.com'

    -- Call SendEmail to connect to the SMTP server and send.
    -- The connection (i.e. session) to the SMTP server remains
    -- open so that subsequent SendEmail calls may use the
    -- same connection.  
    EXEC sp_OAMethod @mailman, 'SendEmail', @success OUT, @email
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @mailman, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @jsonToken
        EXEC @hr = sp_OADestroy @mailman
        EXEC @hr = sp_OADestroy @email
        RETURN
      END

    -- If SendEmail failed because of "Failed to get initial SMTP Response", then it may be 
    -- a firewall or anti-virus blocking communications.
    -- See https://cknotes.com/smtp-office365-com-failed-to-get-initial-smtp-response/

    EXEC sp_OAMethod @mailman, 'CloseSmtpConnection', @success OUT
    IF @success <> 1
      BEGIN

        PRINT 'Connection to SMTP server not closed cleanly.'
      END


    PRINT 'Mail Sent!'

    EXEC @hr = sp_OADestroy @jsonToken
    EXEC @hr = sp_OADestroy @mailman
    EXEC @hr = sp_OADestroy @email


END
GO